August 1931

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Features

Time and the Railroad Dispatcher

By Francis X. Milholland

Carl Akeley's Africa

Which Shall Inherit the Earth--Man or the Insects?

By L. O. Howard

A $35,000,000 Business Home

Worlds From a Catastrophe

By Henry Norris Russell

Hydro-Electric Power in the Ozarks

By A. J. Seaburg

To Stop Soil Erosion Losses

Meeting the Emergencies of a Great City

By Albert A. Hopkins

The Big Noise Behind the 'Mike'

The Earth Beneath

By Ernest A. Hodgson

Staying the Hand of Time

By Milton Wright

And Now, It's Seaweed

Kelp from the Pacific Coast May Supply Elements Which Are Now Lacking in Our Diet

By Helen R. Crane and Emory W. Thurston

Progress and the Telephone

By F. D. McHugh

A Book-Print Reader for the Blind

By Robert E. Naumburg

Blasting Roads to Settle Them

Asquith and Kitchener

A Biographical Study of Two Eminent Englishmen

By W. D. Puleston

Departments

Departments

Across the Editor's Desk, August 1931

Back of Frontispiece, August 1931

Correct Time is Essential to Safe Railroading

Our Point of View, August 1931

Marine Electrolysis Eliminator, Pointers on Nail Points and more

Langmuir Patent Invalid, Chemical Patents and more

Books Selected by the Editors, August 1931

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Digital Issue ?Read or download this issue’s articles online. *A printed copy of this issue is not included. $7.99

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